Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
3.5 / SD3 3" 76 8 3.6
3 ¼" 83 8 3.6
3 ½" 89 8 4.0
3 ¾" 95 9 4.1
4" 102 10 4.6
Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
340 / SD4 3" 102 20 9.1
4 1/8" 105 20 9.1
4 ¼" 108 21 9.6
4 ½" 115 21 9.6
4 ¾" 121 22 10
5" 127 24 10.9
Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
350 / SD5 5" 127 31 14.1
5 1/8" 130 31 14.1
5 ¼" 134 32 14.6
5 ½" 140 33 15
5 ¾" 146 33 15
Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
360 / SD6 6" 153 56 25.5
6 1/8" 156 56 25.5
6 ¼" 159 57 25.9
6 ½" 165 58 26.4
6 ¾" 172 59 26.8
7" 172 61 27.7
7 ½" 191 68 30.9
8" 203 73 33.2
8 ½" 216 76 34.6
8 5/8" 219 77 35
8 ¾" 222 78 35.5
9" 229 81 36.8
9 ½" 241 84 38.2
10" 254 88 40
Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
SD8 7 5/8" 194 91 41.4
7 7/8" 200 92 41.8
8" 203 93 42.3
8 ¼" 210 95 43.2
8 ½" 216 97 44.1
8 5/8" 219 97 44.1
8 ¾" 222 98 44.6
8 7/8" 226 99 45
9" 229 101 45.9
9 ½" 241 105 47.7
10" 254 109 49.6
10 ½" 267 115 52.3
11" 280 120 54.6
11 ½" 292 125 56.8
12" 305 130 59.1
12 ¼" 311 132 60
12 ½" 318 136 61.8
Shank Style Bit Diameter Approximate Weight
inch mm lbs kg
SD12 11 7/8" 302 375 171
12 1/4" 311 380 173
12 1/2" 318 389 177
13" 330 400 182
13 ½" 343 409 186
14" 356 420 191
15" 381 435 198
17" 432 492 224
17½" 445 504 229
The SD15, SD18 & Numa Shank are also available on request
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